XU Zhuo-kui①②,SHEN Xiao-ping③(①School of Info-Physics and Geomatics Engineering,Central South University,Changsha 410083,China;②School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha 410114,China;③CCCC Second Harbor Consultants Co.,Ltd,Wuhan 430071,China)

YIN Peng-cheng①②,LI Gang①,ZHANG Pei①,WANG Yong-jian②(①China University of Mining and Technology/Jiangsu Key Laboratory of Resources and Environmental Information Engineering,Jiangsu Xuzhou 221008,China;②Bureau of Land and Resources of Xuzhou,Xuzhou 221006,China)